octahedral
octane number
octet
octet rule
olefin
optical activity
optical density
optical isomerism
orbital
organic chemistry
osmosis
osmotic pressure
oxidation number
oxidation state
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Chemistry Terms Starting with the Letter O
Chemistry Glossary and Dictionary
By Anne Marie Helmenstine, Ph.D., About.com
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Explore Chemistry
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